Articulated drive shaft for flat screens



NOV. l, 1932. s, B, GORBUTT 1,885,254

ARTICULATED DRIVE SHAFT FOR FLAT SCREENS Fle April 7, 1930 3 Sheets-Sheetl E @am TTDF/VE-W Nov. 1, 1932. s. B. GoRBuTT ARTICULATED DRIVE SHAFT FOR FLAT SCREENS Filed April 7, 1950 3 Sheets-Sheet 2 Fry #v1/:N TUR 5; BGOQBUTT Nov. l, 1932.

s. B. GoRBUfT E 1,885,254

ARTIGULATED DRIVE SHAFT FOR FLAT SCREENS Filed `April 7, 1930 s sheets-sheet 5 Ffg E7 f5 /QTTUR/vv/ Patented Nov. l. 1932 ,SIDNEY E. GOREUTT, E

ron'rLANnoEEeoN, AssIGNoE 'ro ELEGTEIC STEEL EQUNDEY COMPANY?, 0FV PORTLAND,

AETICULATED. DEIVE 'SHAFT ron rLA'r scEEENs 'Application lel April 7, 1930. Serial 110.442,244.

lThis invention relates generally to the paper making industry, and particularly to vmeans for driving flat screens employed therein. ,f The main object of this invention is4 to provide an articulated drive shaft Vfor-iiat screens in .which each section carries one or more ycams* and in which the various sections are flexibly coupled. y

vThe second object isto provide a construc- 4tionvwhich will permit the use ofianti-fri-ction bearings on flat screen drive shafts. v

The third objectv is to facilitate the VVconstruction, assembling and 11p-keep on the fiat screen driving mechanism and to 4reduce the amount oftime ordinarily lost in making repairs. I

The fourth object is to produce a shaft drive for flat screens which will not require accurate alignmentrinorder to enablesame v to operate with aminimum amount of power. The fifth object is to. make it possibleto remove one or more sectionsof the shaft without removing the cams on any of the sections. The sixth object is to make it possible to remove or renew a bearing on an individual section without tou-ching any of the bearings or cams on the other sections. 'y v The seventh object is toso construct the 30 drive that it will not be limitedtoany particular type of bearing.y

The eighth object is` to renderit possible to make a closed screen frame as opposed to the open sided frames now required on account of the use of a single piece drive shaft, thereby decreasing the manufacturing cost of the frame and increasing its rigidity for a given weight. Y

These, and other objects, will'become apparent from the specification following as illustrated in` the accompanying drawings7` in which: .i i

Figure 1 is aside elevation of one end of a shaker screen with portions broken away to show the parts.

Figure 2 is a vertical section along the line 2--2 in Fig. l.

Figurel 3 is a plan of a single unit of the drive shaft along the line 3-3 in Fig. 2.

Figure 4 is a verticall section along the line 4-4 inA Fig. .3 showing ,.Timken bearings. Y Figure 5 is'an elevation of a double unit in .which arer employed ballv bearings showing portions broken away in vertical section.

Figure 6 is a vertical `section through a unit employing what are known as Hyatt7 bearings.V f v- Figure 7 is a vertical section along the line yIi-#Tin Fig..6.f c f Figure Slis a 4vertical-"section through a plain bearing; f l 1.

Figure. 9 is a vertical section along the. line vSirfn'lar numbers of reference Irefer to similar parts throughout the several views.

Referring indetail to the drawings,there is shown a screen box 10 which-is supported on the slopingbase 11. which,vin turn,'is cairriedby a series of spaced side frames 12vwhich are joined at their lower ends by a longitudinalshelf member 13. VThere is also shown a vow box y14v which communicates with the screen box l0 is ymounted the' u-sual. screen plate 16 and a rubber diaphragm 17 which is 'screenbox 10 by means of a-pipe 15.. In the clamped between the boards18 and supported v on the spring board 19 bymeans cfa clamp 20. The spring board 19 is supported ,atits ends from'the base'll. y.

The construction thus described is common in presenteday paper making machinery.

Referring particularly to my invention',

which is the means for imparting a vibratory I motionto the rubber diaphragm 17, attention v is drawn to Fig-1 in which a shaft 21A'is supported in the bearing *base 22 which is provided with a cap 23. 'Within the base'22 and ycap 23 and keyed to the shaft 21A is a cam 24 on which rides aroller 25 carried by -a forked'armf26 lwhich is secured on the end l vof the spring arm v27 whose opposite end is secured totheside frame 12 by meansof the 26 and the clamp 20 is a Connectingllink 33 21-A extends from each'end of the bearing base 22 and is splined at each end to receive the coupling 34. The coupling 34 is held in position by means of a bolt 35.

In Figure 3 one coupling 34 is shown in a driving position and the other one moved toward the bearing for the purpose of permitting the removal of an adjacent shaft.

` End thrust is taken care of inthis form of the device by shouldering the shaft 21- (as shown in Fig. 4) and providing a Timlen bearing 36 at each shouldered shaft portion. Each bearing 36 is confined within a retainer 37 which is itself mounted in a recess 38 formed'within the base 22 andcap 23 and is secured therein by means ofthe screws 39. yLubricant is prevented from escaping from the bearings 36 by means of the felt rings 40.

In Fig. a somewhat similar construction is employed except that instead of a. single cam having a bearing on each'sideof same (as just described) two cams24B are mounted on the shaft 21-B whose ends 21C are splined. In this form fof the device two spaced housings 41 are employed which are held in relation to each other by a 'channel shaped connecting bar 42. f The innermost ends 43 of thehousings 41 are provided with openings 44 through which the shaft 21e-B freely passes. f The outer end'of each housing l41v contains a ball bearing 45which is held within the flanged sleeve 46 by means of a retainer 47. The sleeve 46 and the retainer 47 are held in position within the housing1 41 `by means of the bolts48.

With this form of the device a single shaft unit is supported on a pair of spaced bearings which are held in alignment by the connecting element 42.

In the form of the device shown'in Fig. 6 another modification is shown. The housing 49 contains a cam 50 which issecured on the shaft 51. In this instance the I-Iyatt roller bearing 52 is provided at one end of the housing 49 and the opposite end of the housing 49 is provided with a free opening 53. In

this case the housing 49 is provided with an extension base 54 on the opposite end of which is mounted a single Hyatt roller bearing 55 through which projects the shaft 51 and on which projecting end is placed the coupling 56 through which the shaft 51 is driven from the speed reducing mechanism contained within the casing 57, power being supplied from the motor 58, or from any other convenient source. v

In Figures 8 and 9 there is illustrated a housing 59 in which the shaft 60 is supported by the plain bearings 61 between which is a cam 62 which is secured on the shaft 60. It

will be noted that in each instance the caps Y which are placed over the cams are provided with a cut-away portion 63 through which the roller 25 contacts with its cam.

It will be seen from the above that the device adapts itself to various forms of'antifriction and plain bearings, the former, of course, being more desirable, but have not been employed' in the past owing to the fact that all of these bearings must be slipped over the end of the shaft, and if a single bearing or cam had to be removed it meant that the entire shaft assemblyhad to be taken down, and if the cams were shrunk on the shaft, as is usually the case, it required no small amount ofv labor 'to perform this` operation. Therefore, plain split bearings Vare now universally. used and invsome instances split cams are employed, although these areobviously objectionable.

.By employing an articulated shaftrcomposed of sections of one and two unitcams the device readily adapts itself to any type of flat screen, regardless of the'number of screen units it containsor the positioning of the supporting frames 12. In some instances i the single cam unit works inbetter than the double, and in other instances the reverse is true. r f

I claim:

'1. A flat screen the combination of an elongated' screen box havinga series of vibrator diaphragms forming the bottom thereof, and an elongated articulated drive shaft parallel with the length of the screen boxfor vibrating ,said diaphragms consisting of a plurall it)7 of sections of shafting flexibly joined, each of said sections having diaphragm operating means mounted thereon and having anti-friction bearings on both sides of said diaphragm operating means.

2. In a stock screen the `combination of "a plurality of spaced upright frame members for supporting an elongated stock screen, an articulated drive shaft for operating said screen parallel with and located under said screen consisting of a plurality of substantially coaxial shaft sections, each of said sections having a pair of bearing members, each of said sections being less in length than the spacing of said upright frames, and flexible driving connections between the sections of said shaft. I

SIDNEY B. GQRBUTT.

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